Transcription of IEEE 802.11 Wireless LANs
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IEEE 802.11 Wireless LANs
Unit 11 IEEE Wireless LANsShyam ParekhShyam ParekhShyam ParekhShyam ParekhIEEE Wireless LANs References Standards Basics Physical Layer MAC Framing Details Management PCF QoS ( ) Security Take Away PointsTOC Wireless Networks: The Definitive Guide, M. Gast, O Reilly, 2002* ANSI/IEEE Std , 1999 Edition ANSI/IEEE Std ANSI/IEEE Std *Most drawings used in the lectures are from this bookTOC ReferencesIEEE 802 Standards & OSI Model Observe MAC is common to all Physical Layer (PHY) standards PHY is split into Physical Layer Convergence Procedure (PLCP) and Physical Medium Dependent (PMD) sublayersTOC StandardsRelated Standards Bluetooth Originally intended for interconnecting computing and communication devices HIPERLAN European standar
Between ESSs, transitions are not supported TOC – 802.11 – Basics. 802.11b: HR/DSSS *PHY Use Complementary Code Keying (CCK) instead of Differential Quadrature Phase Shift Keying (DQPSK) used at lower rates Provides good performance in presence of interference and multipath fading
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